Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves

In this study, the oven drying behaviour, as well as changes in the morphological appearance of Vernonia amygdalina leaves before and after drying were investigated. The drying experiments were conducted using a universal oven. Vernonia amygdalina leaves were dried at 40, 50 and 60 °C air temperatur...

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Main Authors:	Alara, Oluwaseun Ruth, Nour, A. H., Olalere, Olusegun Abayomi
Format:	Article
Language:	English
Published:	Elsevier 2017
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/1/DJ3.pdf

id	ump-21922
recordtype	eprints
spelling	ump-219222019-09-10T04:07:50Z http://umpir.ump.edu.my/id/eprint/21922/ Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves Alara, Oluwaseun Ruth Nour, A. H. Olalere, Olusegun Abayomi TP Chemical technology In this study, the oven drying behaviour, as well as changes in the morphological appearance of Vernonia amygdalina leaves before and after drying were investigated. The drying experiments were conducted using a universal oven. Vernonia amygdalina leaves were dried at 40, 50 and 60 °C air temperatures. During the drying processes, the air flow rate was held at 1 m/s2 and the samples spread on the drying trays were placed parallel to the direction of air flow. The obtained data were fitted to eleven different mathematical drying models. Four statistical tools, viz, correlation coefficient, mean bias error, sum of the square error, and reduced chi-square were used to analyse the fittings. Amongst the considered drying models, Midilli-Kucuk drying model showed the best fitting in describing the drying behaviour of Vernonia amygdalina leaves. In addition, the effective diffusivities for the three air temperatures ranged from 4.55 × 10−12 to 5.48 × 10−12 m2/s with the activation energy of 8.048 kJ/mol. Moreover, to evaluate the effect of drying conditions on the morphological changes of Vernonia amygdalina leaves, fresh and dried leaves under different conditions were compared. Thus, drying conditions had effects on microstructure of Vernonia amygdalina leaves. Elsevier 2017-09-09 Article PeerReviewed pdf en cc_by_nc_nd_4 http://umpir.ump.edu.my/id/eprint/21922/1/DJ3.pdf Alara, Oluwaseun Ruth and Nour, A. H. and Olalere, Olusegun Abayomi (2017) Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves. Journal of the Saudi Society of Agricultural Sciences. pp. 1-7. ISSN 1658-077X (In Press) https://doi.org/10.1016/j.jssas.2017.09.003 doi: 10.1016/j.jssas.2017.09.003
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Alara, Oluwaseun Ruth Nour, A. H. Olalere, Olusegun Abayomi Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
description	In this study, the oven drying behaviour, as well as changes in the morphological appearance of Vernonia amygdalina leaves before and after drying were investigated. The drying experiments were conducted using a universal oven. Vernonia amygdalina leaves were dried at 40, 50 and 60 °C air temperatures. During the drying processes, the air flow rate was held at 1 m/s2 and the samples spread on the drying trays were placed parallel to the direction of air flow. The obtained data were fitted to eleven different mathematical drying models. Four statistical tools, viz, correlation coefficient, mean bias error, sum of the square error, and reduced chi-square were used to analyse the fittings. Amongst the considered drying models, Midilli-Kucuk drying model showed the best fitting in describing the drying behaviour of Vernonia amygdalina leaves. In addition, the effective diffusivities for the three air temperatures ranged from 4.55 × 10−12 to 5.48 × 10−12 m2/s with the activation energy of 8.048 kJ/mol. Moreover, to evaluate the effect of drying conditions on the morphological changes of Vernonia amygdalina leaves, fresh and dried leaves under different conditions were compared. Thus, drying conditions had effects on microstructure of Vernonia amygdalina leaves.
format	Article
author	Alara, Oluwaseun Ruth Nour, A. H. Olalere, Olusegun Abayomi
author_facet	Alara, Oluwaseun Ruth Nour, A. H. Olalere, Olusegun Abayomi
author_sort	Alara, Oluwaseun Ruth
title	Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
title_short	Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
title_full	Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
title_fullStr	Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
title_full_unstemmed	Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves
title_sort	mathematical modelling and morphological properties of thin layer oven drying of vernonia amygdalina leaves
publisher	Elsevier
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/ http://umpir.ump.edu.my/id/eprint/21922/1/DJ3.pdf
first_indexed	2023-09-18T22:32:23Z
last_indexed	2023-09-18T22:32:23Z
_version_	1777416372060422144

Mathematical modelling and morphological properties of thin layer oven drying of Vernonia amygdalina leaves

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